气候变化领域集成服务门户(CCPortal): Channelization cascade in landscape evolution

CCPortal

DOI	10.1073/pnas.1911817117
	Channelization cascade in landscape evolution
	Bonetti S.; Hooshyar M.; Camporeale C.; Porporato A.
发表日期	2020
ISSN	0027-8424
起始页码	1375
结束页码	1382
卷号	117 期号:3
英文摘要	The hierarchy of channel networks in landscapes displays features that are characteristic of nonequilibrium complex systems. Here we show that a sequence of increasingly complex ridge and valley networks is produced by a system of partial differential equations coupling landscape evolution dynamics with a specific catchment area equation. By means of a linear stability analysis we identify the critical conditions triggering channel formation and the emergence of characteristic valley spacing. The ensuing channelization cascade, described by a dimensionless number accounting for diffusive soil creep, runoff erosion, and tectonic uplift, is reminiscent of the subsequent instabilities in fluid turbulence, while the structure of the simulated patterns is indicative of a tendency to evolve toward optimal configurations, with anomalies similar to dislocation defects observed in pattern-forming systems. The choice of specific geomorphic transport laws and boundary conditions strongly influences the channelization cascade, underlying the nonlocal and nonlinear character of its dynamics. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Detachment limited; Drainage area; Landscape evolution model; Ridge and valley patterns; River networks
语种	英语
scopus关键词	Article; channelization; controlled study; dynamics; environmental factor; erosion; fluid turbulence; geographic and geological phenomena; land use; landscape; linear stability analysis; mathematical analysis; pattern forming system; priority journal; ridge; runoff; simulation; soil; tectonic uplift; valley
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161084
作者单位	Bonetti, S., Department of Environmental Systems Science, Swiss Federal Institute of Technology (ETH) Zürich, Zürich, 8092, Switzerland; Hooshyar, M., Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, United States, Princeton Environmental Institute, Princeton University, Princeton, NJ 08544, United States, Princeton Institute for International and Regional Studies, Princeton University, Princeton, NJ 08544, United States; Camporeale, C., Department of Environment Land and Infrastructure Engineering, Politecnico di Torino, Turin, 10129, Italy; Porporato, A., Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, United States, Princeton Environmental Institute, Princeton University, Princeton, NJ 08544, United States
推荐引用方式 GB/T 7714	Bonetti S.,Hooshyar M.,Camporeale C.,et al. Channelization cascade in landscape evolution[J],2020,117(3).
APA	Bonetti S.,Hooshyar M.,Camporeale C.,&Porporato A..(2020).Channelization cascade in landscape evolution.Proceedings of the National Academy of Sciences of the United States of America,117(3).
MLA	Bonetti S.,et al."Channelization cascade in landscape evolution".Proceedings of the National Academy of Sciences of the United States of America 117.3(2020).